CN104810617B - A kind of antenna element and terminal - Google Patents
A kind of antenna element and terminal Download PDFInfo
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- CN104810617B CN104810617B CN201410035207.2A CN201410035207A CN104810617B CN 104810617 B CN104810617 B CN 104810617B CN 201410035207 A CN201410035207 A CN 201410035207A CN 104810617 B CN104810617 B CN 104810617B
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
- H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Details Of Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention discloses a kind of antenna element and terminals.Antenna element of the invention includes: antenna circuit board, at least two adjacent antennas and the electromagnetic coupling module for coupled signal transmission between adjacent two antenna to be isolated；The electromagnetic coupling block coupled in series is between two adjacent antennas；The present invention is transmitted using the signal between electromagnetic coupling module isolation adjacent antenna, i.e., so that electric signal transmission reduces the signal coupling between adjacent antenna, improve the isolation between adjacent two antenna less than opposite end in two antennas.
Description
Technical field
The present invention relates to mobile radio telecommunications technical applications more particularly to a kind of antenna element and terminals.
Background technique
Recently as the universal of mobile terminal and development, new communication system constantly pursues higher transmission rate and more greatly
Channel capacity.(LTE and its LTE-A of evolution, WiMAX system etc.), MIMO (Multi-Input in 4G communications regime
Multi-Output, multiple-input and multiple-output) antenna technology become promoted data rate core feature.It refers in channel radio
The receiving end of letter system and transmitting terminal are equipped with more antennas, with forming multiple parallel transmission channels in a space,
So that multiple data flows is carried out parallel transmission using these independent channels, to increase power system capacity, improves the availability of frequency spectrum.
For MIMO communication system, when mutiple antennas is arranged in space more recently condition, the reception signal of each antenna it
Between there is correlations.Correlation is bigger, and the independence between each signal path is lower, to system overall transfer performance
Deleterious effects are more significant.Therefore the correlation in mimo system between each antenna is effectively reduced and improves the isolation between each antenna
It spends (Isolation), is one of the key technology point for realizing mimo system high speed data transfer.With further drilling for technology
Into in order to support higher transmission rate, newest LTE-Advanced standard (3GPP Release12) has begun support 4
× 4 MIMO technology configures 4 antennas on transmitting terminal and receiving end, that is, base station and mobile phone terminal, this 4 days
Line works at the same time, without point of primary and secondary.It is required that each antenna has the radio frequency and electromagnetic performance of balance, and between each antenna
Keep lower correlation and higher isolation.
In base station side, due to there is no strict requirements to antenna for base station occupied space, can by increase antenna it
Between spacing, or reduce the correlation between antenna by way of polarization orthogonal between antenna.But in terminal side, especially
On mobile phone Terminal Type, due to being limited by physical size, arranging mutiple antennas and requiring to keep lower between each antenna simultaneously
Correlation and higher isolation, just have very big technological challenge: terminal miniaturization demand makes antenna that can not pass through increase
Spacing improves isolation, while the radiation of terminal electronically small antenna does not often have apparent polarization tendency, therefore is difficult to pass through letter yet
Single polarization orthogonal improves the isolation of terminal antenna.Therefore current stage terminal generally only configures two antennas, i.e., main day
Line and auxiliary antenna.Wherein primary antenna is independently used for the transmitting-receiving of wireless communication signals, and auxiliary antenna can work under MIMO reception pattern,
To improve signal data transmission rate.
The method of traditional raising terminal antenna isolation is broadly divided into three classes: using different types of antenna combination, no
Same placement location；Increase floor parasitic metal conductor or parasitic gap structure changes mutual coupling of antenna；Between antenna increase decoupling line/
Balanced line/Decoupling network method.Wherein first kind method is limited big by the intrinsic physical size of terminal, is difficult to be able in practice
Using.Second and third class method relative decoupling smaller bandwidth, have now been found that it is preferable mainly for 2GHz or more high band effect,
Such as LTE Band7 (2500-2690MHz), LTE Band40 (2300-2400MHz) etc..And for LTE 700MHz low-frequency range,
Such as LTE Band12 (698-746MHz), LTE Band13 (746-787MHz), LTE Band17 (704-746MHz), decoupling effect
Fruit is simultaneously bad, it is difficult to meet actually required broadband character.Antenna academia thinks at present, and mimo system requires terminal more days
The index of line are as follows: single antenna efficiency is 40% or more, and any two isolation between antennas is in 15dB or more.Therefore, tight in handheld terminal
Again in limited space, arrange that 4 LTE low-frequency range antennas cut down the coupling between each antenna while guaranteeing antenna efficiency
To guarantee that higher isolation becomes the key difficulties of terminal 4 × 4MIMO Antenna Design.
Summary of the invention
The main technical problem to be solved in the present invention is to provide a kind of antenna element and terminal, can be improved between antenna
Isolation.
In order to solve the above technical problems, the present invention provides a kind of antenna element, comprising: antenna circuit board, at least two phases
Adjacent antenna and the electromagnetic coupling module for coupled signal transmission between adjacent two antenna to be isolated；The electromagnetic coupling module
It is connected between two adjacent antennas.
Further, the electromagnetic coupling module includes: isolated metal structure and lumped-parameter element；
The isolated metal structure by lumped-parameter element respectively with two adjacent antenna in series, the isolating metal
Structure is made of at least one independent sub- metal part, is connected between the sub- metal part by the lumped-parameter element
It connects, an end of the sub- metal part hanging perhaps open a way another end ground connection or short circuit.
Further, lumped-parameter element is in series in the independent sub- metal part.
Further, the lumped-parameter element includes automatically controlled adjustable device, and the control line of the automatically controlled adjustable device is logical
The end for crossing the sub- metal part controls itself.
Further, the electromagnetic coupling module includes: parallel resonant LC circuit.
Further, the antenna circuit board includes Liang Ge antenna headroom area, and the antenna headroom area is equipped at least two
Adjacent antenna, described two antenna headroom areas are on a different plane.
Further, the antenna element includes first antenna group and the second antenna sets, the first antenna group and described
Second antenna sets include at least two adjacent antennas, and the first antenna group and second day group are arranged in the antenna electric
In the different or identical levels of road plate.
Further, the first antenna group includes two adjacent antennas, and second antenna sets include two adjacent
Antenna, first antenna group setting is arranged in antenna circuit board surface layer upper end, second antenna sets in the day
The lower end of line circuit board bottom；Two antennas are relative to the antenna circuit board long axis mirror symmetry point in the first antenna group
Cloth, two antennas are distributed relative to the antenna circuit board long axis mirror symmetry in the second antenna sets.
For the purposes of solving above-mentioned technical problem, the present invention also provides a kind of terminals, including antenna list as described above
The operating circuit of member, main circuit board and terminal；The operating circuit of the terminal is arranged on the terminal main circuit board, the day
Line is connect with the main circuit board.
Further, the terminal further includes spacer；The spacer is arranged in the main circuit board and the antenna
Between mainboard.
The beneficial effects of the present invention are:
The present invention provides a kind of antenna elements and terminal can be improved the isolation between antenna, and can be effectively
It applies in low-frequency range antenna.Antenna element of the invention includes: antenna circuit board, at least two adjacent antennas and is used for
The electromagnetic coupling module that coupled signal transmits between adjacent two antenna is isolated；The electromagnetic coupling block coupled in series is at adjacent two
Between antenna；The present invention is transmitted using the signal between electromagnetic coupling module isolation adjacent antenna, i.e., so that electric in two antennas
Signal transmits the signal coupling reduced between adjacent antenna less than opposite end, improves the isolation between adjacent two antenna, with
Traditional parasitic metal conductor or gap structure is compared with balanced line/decoupling line technology, and antenna element of the invention can overcome
Traditional high isolation technology has broader isolation bandwidth the low frequency narrow bandwidth the shortcomings that, and the scope of application is than wide.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram for antenna element that the embodiment of the present invention one provides；
Fig. 2 is a kind of schematic illustration for antenna element that the embodiment of the present invention one provides；
Fig. 3 is the schematic illustration for another antenna element that the embodiment of the present invention one provides；
Fig. 4 is provided by Embodiment 2 of the present invention a kind of applies antenna element in 4 × 4MIMO high of terminal LTE low-frequency range
Schematic diagram on isolated antennas；
Fig. 5 is two adjacent antennas provided by Embodiment 2 of the present invention in PCB media plate thickness edge cabling schematic diagram；
Fig. 6 is adjacent two antennas key cabling physical size schematic diagram provided by Embodiment 2 of the present invention；
Fig. 7 is adjacent two antenna back side cabling physical size schematic diagram provided by Embodiment 2 of the present invention；
Fig. 8 is single antenna artificial reflections coefficient schematic diagram provided by Embodiment 2 of the present invention；
The coefficient of coup schematic diagram that Fig. 9 is emulated between four antennas provided by Embodiment 2 of the present invention；
Figure 10 is a kind of schematic diagram of four-antenna system provided by Embodiment 2 of the present invention；
Figure 11 is a kind of structural schematic diagram for terminal that the embodiment of the present invention three provides；
Figure 12 is the antenna for four antenna terminal of one kind that the embodiment of the present invention three provides and the top view of operating circuit arrangement；
Figure 13 is the antenna for four antenna terminal of one kind that the embodiment of the present invention three passes through and the side view of operating circuit arrangement.
Specific embodiment
Due to the presence of electromagnetic coupling in existing multiple antennas, the signal that adjacent antenna understands some passes through coupling side
Formula is transferred to opposite end antenna, thus causes antenna performance decline, has a significant impact to transmission performance.For each antenna of abatement
Between coupling to guarantee that higher isolation considers that the invention proposes a kind of antenna elements, comprising: antenna circuit board,
At least two adjacent antennas and the electromagnetic coupling module for coupled signal transmission between adjacent two antenna to be isolated；The electricity
Magnetic coupling module is connected between two adjacent antennas.The present invention makes the coupling between adjacent antenna using electromagnetic coupling module
Signal transmission is closed less than opposite end, improves the isolation between antenna, the coupling cut down between adjacent antenna ensure that antenna
Performance.Meanwhile antenna element of the invention can apply the disadvantage on low-frequency antenna, day of the invention with traditional isolation technology
Line unit is suitable for the antenna of multiple frequency range.
Below by specific embodiment combination attached drawing, invention is further described in detail.
Embodiment one:
Present embodiments provide a kind of antenna element, comprising: antenna circuit board, at least two adjacent antennas and be used for
The electromagnetic coupling module that coupled signal transmits between adjacent two antenna is isolated, the electromagnetic coupling block coupled in series is at adjacent two
Between antenna.Electromagnetic coupling module includes isolated metal structure and lumped-parameter element in the present embodiment；The isolating metal
For structure by lumped-parameter element respectively with two adjacent antenna in series, the isolated metal structure is independent by least one
Sub- metal part is constituted, and is connected between the sub- metal part by the lumped-parameter element, the one of the sub- metal part
A end hanging perhaps open a way another end ground connection or short circuit.
The isolation technology that antenna element of the invention uses is: arranging isolated metal structure between adjacent double antenna；
The isolated metal structure is made of N number of independent sub- metal part；Exist between the isolated metal structure and antenna cabling
Multiple gaps.Lumped-parameter element (capacitor, inductance and resistance) bridging is disposed on the gap, can by sub- metal structure and
Antenna adjacent traces connect；The metal structure and the lumped-parameter element constitute the electromagnetism coupling between double antenna together
Structure is closed, the coupling of antenna can be substantially reduced under resonance conditions to improve the isolation between double antenna.
The present embodiment neutron metal part has beam shapes, annular or other geometries；The lumped parameter member
Part can be automatically controlled controllable impedance or capacitor, and the control line of the automatically controlled adjustable device can pass through the end of sub- metal part
Adjustable device is controlled.
Preferentially, lumped-parameter element is in series in independent sub- metal part described in the present embodiment.The present embodiment day
The electromagnetic coupling structure between double antenna can be constituted by isolated metal structure and all lamped elements together in line unit, it should
Electromagnetic coupling structure can be equivalent at open-circuit condition on operating frequency of antenna, so that the electromagnetism between adjacent two antenna be isolated
Coupling.
As shown in Figure 1, being a kind of structure of antenna element of the invention, wherein antenna 101 and 102 is adjacent to each other two
A antenna.The antenna 101 and antenna 102 have matching (Matching) circuit 105 and 106 independent respectively.Feeding point
107,108 are electrical connected with the antenna 101 and antenna 102 respectively.Between the antenna 101 and 102, setting be improved every
Isolated metal structure 109 from degree.The isolated metal structure 109 can be made of 1-N metal part independent of each other.Wherein
Metal part 101 is a sub- metal part example.Optionally, 101 shape of sub- metal part can be ribbon, annular
Or other geometric figures.There is mutual with isolated metal structure 109 for the antenna cabling of antenna 101 described in Fig. 1 and antenna 102
Close part cabling 103 and part cabling 104.In antenna cabling 103, antenna cabling 104 and isolated metal structure 109 it is each
Between a sub- metal parts, there are spatial gaps 111.Each sub- metal structure both ends form can be used ground terminal 112 or
Open end 113.Optionally, between the sub- metal part of the isolated metal structure 109 and antenna cabling 103, cabling 104 it
Between gap 111 on, lumped-parameter element 114 (capacitor, inductance or resistance) can be bridged.Optionally, in the upper isolating metal
The sub- metal part of structure 109 can concatenate lumped-parameter element 115 (capacitor, inductance or resistance).The antenna element of the present embodiment
Increase isolated metal structure 109, between two adjacent antennas by adjusting the 109 neutron metal portion of isolated metal structure
Divide 101 size positions physical parameter, adjusts the lumped-parameter element 114 between being connected across metal on gap 111, adjustment is serially connected in
Lumped-parameter element 115 in each sub- metal part 110 reaches the mesh for improving isolation between adjacent antenna 101 and 102
Mark.Further, the lumped-parameter element 114 and 115 in isolated metal structure 109 (such as can may be used using automatically controlled adjustable device
Adjust capacitor, tunable capacitor etc.), realize the control from degree with frequency.In this case, the control line of automatically controlled adjustable period and control
Signal (GPIO, SPI, MIPI etc.) processed can pass through interest category partial earthing end 112 or 113 feed-in of open end.Under adjustable mode,
When the antenna 101,102 work is in different standards and frequency range, isolation between the two can be done accordingly in real time
The performance of broadband high isolation is realized in adjustment.
As shown in Fig. 2, the present embodiment antenna element is by increasing between two antennas closed on 101 and antenna 102
Isolated metal structure 109.The isolated metal structure is made of N number of independent sub- metal part, in antenna cabling and each interest
Belong between part and there is gap.These metal slits and the lamped element being connected across on gap, are serially connected in sub- metal part
Lamped element together, between antenna 101 and antenna 102 formed a complicated electromagnetic coupling structure, for eliminating antenna
Between coupling to improving isolation.Simplified, this electromagnetic coupling structure is equivalent to become a parallel resonant LC circuit.Institute
In the working frequency needed, parallel resonance is integrally equivalent at open-circuit condition, so that antenna 101 and antenna 102 be isolated, passes through reduction
Capacitive coupling achievees the purpose that improve isolation between antenna.
As shown in figure 3, when lumped-parameter element includes automatically controlled adjustable device in antenna element, i.e. isolating metal in Fig. 1
Lumped-parameter element 114 and 115 in structure 109 uses automatically controlled adjustable device, may be implemented to adjacent antenna sensitivity can
Regulation system.In principle, the present embodiment is to pass through the inductance L and capacitance C changed in equivalent parallel resonant lc circuit, realizes work
Working frequency is continuously adjusted.Achieve the purpose that isolation follows operating frequency of antenna real-time, tunable.
Above content is introduced by arranging N number of sub- metal part and lumped-parameter element between adjacent antenna, in work
When making, sub- metal part and lumped parameter constitute an electromagnetic coupling structure, eliminate the coupling between antenna to improve every
From degree.Parallel resonant LC circuit can also directly be arranged between adjacent antenna and be used to eliminate the coupling between antenna for certain the present embodiment
Closing is that electromagnetic coupling module may include parallel resonant LC circuit in the present embodiment antenna element, the parallel resonant LC circuit resonance
When integrally can be equivalent at open-circuit condition, signal just transmits the effect for having reached isolated antennas less than opposite end antenna in such two antenna
Fruit improves isolation between antennae.
Under normal circumstances, antenna cabling is arranged in the antenna headroom area of circuit board, the antenna element of the present embodiment
Middle pcb board includes Liang Ge antenna headroom area, arranges that at least two adjacent antennas, the present embodiment can pass through in antenna headroom area
Antenna headroom area is bent, so that Liang Ge antenna headroom area is not in the same plane.For example, when PCB upper and lower side is arranged
When clearance zone, two clearance zones are spatially turned up, make entire pcb board it is S-shaped distribution with improve any antenna it
Between isolation and improve the radiation efficiency of antenna.
Preferentially, antenna element described in the present embodiment includes first antenna group and the second antenna sets, the first antenna
Group and second antenna sets include at least two adjacent antennas, and the first antenna group and second day group are arranged in institute
It states in the different or identical levels of antenna circuit board.The coupling of each group antenna can be reduced in different levels by being provided with,
Promote each group antenna performance.
It can also can also be arranged in the metal ground of the surface layer PCB and bottom in order to further enhance the isolation of antenna
Corresponding a plurality of gap increases isolation.The shape in optional gap can be L shape or T shape.
The present embodiment antenna element can be used as terminal 4 × 4MIMO antenna, specifically, first day described in the present embodiment
Line group includes two adjacent antennas, and second antenna sets include two adjacent antennas, and the first antenna group setting exists
The lower end of the antenna circuit board bottom is arranged in antenna circuit board surface layer upper end, second antenna sets；Described first
Two antennas are distributed relative to the antenna circuit board long axis mirror symmetry in antenna sets, and two antennas are opposite in the second antenna sets
It is distributed in the antenna circuit board long axis mirror symmetry.Four antennas can be LTE low-frequency range antenna in antenna element at this time, should
4 × 4MIMO of terminal antenna cuts down the coupling between each antenna while guaranteeing antenna efficiency to guarantee higher isolation
Degree.
The electromagnetism that can be equivalent to open circuit at work is arranged in the antenna element of the present embodiment between adjacent antenna
Coupled structure eliminates the coupling between antenna, improves isolation, and the antenna element of the present embodiment can be applied
In LTE low-frequency range Antenna Design, the coupling of low-frequency range antenna is efficiently solved the problems, such as.Such as the antenna element of the present embodiment
It can effectively apply in the design of LTE low frequency 700MHz high-isolation antenna, meet future LTE-A to the skill of terminal antenna
Art requirement, and guarantee the miniaturization of antenna and terminal.Aforementioned terminals system schema can guarantee any in entire 4MIMO antenna
Two isolation between antennas are obviously improved, and are easy to integrate with circuit system, finally realize 4 in miniaturization terminal
The performance indicator of × 4MIMO.
Embodiment two:
The present embodiment applies above-mentioned antenna element in the LTE low-frequency range 4MIMO high isolation Antenna Design of end, specifically,
As shown in figure 4, four antennas are to be printed on two faces of PCB (Planar Circuit Board) plate in the present embodiment
IFA (Inverted F Antenna) antenna.The size of PCB whole plate is 80 × 210mm, thickness 1mm.4 (a) figures are the surface layer PCB
Cabling form, 4 (b) be the bottom cabling form of PCB.As shown, wherein antenna 1 (diagram 301) and antenna 2 (illustrating 302)
Cabling is located at the upper end of pcb board skin surface, is distributed opposite to each other in PCB long axis mirror symmetry.And antenna 3 (diagram 303) and
Antenna 4 (diagram 304) is located at the lower end of pcb board bottom surface, is distributed opposite to each other in PCB long axis mirror symmetry.Feeding point
305,306,307,308 are electrical connected with 4 antennas 301,302,303,304 respectively.Wherein antenna 1 (diagram 301), antenna 2
(diagram 302), antenna 3 (diagram 303) and antenna 4 (diagram 304) are respectively provided with corresponding 309,310,311 He of match circuit
312.Matching used in this example is 2pF capacitor element in parallel.On the surface layer PCB, there is metal grounds 313, in PCB
Bottom metal ground 314 is distributed with, for 4 antennas provide radiation with reference to ground.The physical size of the metal ground is
80×160mm.In addition, the physics of the clearance zone 316 of the clearance zone 315 of antenna 301 and antenna 302, antenna 303 and antenna 304
Having a size of 80 × 25mm.In order to further increase the isolation of 4 antennas between any two, in 313 He of coating metal ground level of PCB
L shape metal slit is also opened on underlying metal ground level 314.The corresponding double L shape metal slits of the antenna 1 (diagram 301) are
317 and 318.The length in gap 317 and 318 described in the present embodiment is respectively 86.3mm and 102.5mm, and the width in two gaps is
1.7mm.As shown, antenna 302,303,304 has identical and symmetrical gap on PCB metal ground 313 and 314
Distribution.Specifically, high isolation metal structure corresponds to the metal band 319 between antenna 301 and antenna 302 in the present embodiment,
320 and 321.The PCB coating metal band is electrically connected with corresponding underlying metal band 322,323,324 again.It can see
Out, the metal band 320 in surface layer and metal 313 is electrical connected.The metal band 322,323,324 is in bottom and gold
Possession 314 is electrical connected.Thus, it can be known that the sub- metal part 319,321 is single-ended short circuit/single-ended open circuit type of attachment；Son
Metal part 320 is the type of attachment of both-end short circuit.Further, it is walked in the metal band 319,320,321 and antenna
On the gap of line 301,302, bridging has lumped-parameter element 325,326,327 and 328.Lumped-parameter element 325 in this example
The inductance for being 22nH with 328, lamped element 326 and 327 are the capacitor of 0.5pF.Symmetrically, between antenna 303 and antenna 304
There are identical isolating metal band and lumped-parameter elements.Optionally, the surface layer PCB ground level 313 and bottom ground level 314,
It can be electrically connected by via hole 329, form unified antenna ground plane.
In brief, LTE Band13 low frequency 4MIMO antenna shown in Fig. 4, specifically use isolated metal structure (319,
320,321,322,323,324 etc.) and lumped-parameter element (325,326,327,328) Lai Tigao adjacent antenna 301 and 302
Isolation.By being grouped and being located at the form of the surface layer PCB cabling and bottom cabling for antenna 301,302 and antenna 303,304, and
And it is incorporated in the surface layer PCB ground level 313, it is arranged symmetrically the mode in double L shape gaps on bottom ground level 314, reduces 4MIMO system
The coupling between antenna two-by-two, to improve isolation, and ensure that the radiation efficiency of each antenna in system.
Fig. 5 is two adjacent antennas in Fig. 4 example in PCB media plate thickness edge cabling schematic diagram.Specific surface layer every
From metal band 319,320,323 by the metal band 330,331,332 of side respectively with the isolator metal band of bottom
322,323,324 are electrical connected.Optionally, the coating metal band 319,320,323 can also pass through via hole and the bottom
Layer metal band 322,323,324 is electrical connected.
Fig. 6 and Fig. 7 is the adjacent two antennas key cabling physical size schematic diagram of Fig. 4 example of the present invention.Numerical value unit in figure
For millimeter.Since 4 IFA antennas of this example belong to full symmetric form, all physical sizes are all identical.
Since four antennas are full symmetric, Fig. 8 only shows example single antenna simulated return loss.It can be with from figure
Find out single antenna resonance in the frequency range of LTE Band13 (746-787MHz).It is measured by actual jig, in Fig. 4
The efficiency of 4 antennas of example is 40% or so.Fig. 9 be emulated between 4 antenna elements of example in Fig. 4 the coefficient of coup (every
From degree, S parameter).It can be seen from the figure that due to using high isolation technology of the invention, two adjacent antennas 1 (diagram 301)
Isolation between antenna 2 (diagram 302) has reached 15dB substantially.And antenna 1 (diagram 301) and antenna 3 (diagram 303), day
Isolation between line 1 (diagram 301) and antenna 4 (diagram 304), is also up to 11dB.It is measured by actual jig, day
The isolation of line 1 and antenna 2 in LTE Band13 has been greater than 15dB.And antenna 1 and antenna 3, between antenna 1 and antenna 4 every
From degree also between 12dB to 13dB.
Further, can also as shown in Figure 10 in order to improve isolation of Fig. 4 example two-by-two between antenna, it will be described
Antenna headroom region 315 and 316 is turned up to both direction rotation alpha angle.Entire pcb board side view is S-shaped at this time.Due to
Antenna 301,302 and antenna 303,304 are located at the different surfaces of PCB, change antenna on certain angle time by bending
Directionality, can be further improved reduce antenna space radiation coupling.Using this scheme, final jig measured result
Are as follows: any two isolation between antennae is all larger than 15dB, and single antenna efficiency guarantees 40% or so.
Embodiment three:
As shown in figure 11, a kind of terminal is present embodiments provided, comprising: the day as described in embodiment one or embodiment two
The operating circuit of line unit, main circuit board and terminal；The operating circuit of the terminal is arranged on the terminal main circuit board, institute
Antenna is stated to connect with the main circuit board.
In order to reduce the signal interference between the operating circuit on antenna circuit board on antenna and main circuit board, the present embodiment
Terminal one spacer can be set between main circuit board and the antenna mainboard.
It is a kind of schematic diagram of four antenna terminals provided in this embodiment such as Figure 12.Due to LTE low frequency 700MHz 4MIMO
The design difficulty of antenna, in order to guarantee the high-isolation between any two antenna, while using high isolation technology of the present invention,
It is also required to carry out processing of cracking to PCB metal ground.This just will affect the layout and cabling of terminating circuit.It is asked to solve this
Topic, for 4MIMO high isolation antenna scheme, scheme that can be separated using antenna ground plane and circuit ground level.Specifically such as
Shown in Figure 12, antenna 601,602,603,604 is symmetrically distributed on antenna PCB main board 605.On antenna PCB main board ground level
There is the gaps 608 for guaranteeing isolation.Terminal baseband (Base Band, BB) circuit, radio circuit (RadioFrequency,
RF) circuit and LCD display unit are respectively positioned on independent circuit main board 606.The circuit main board, which is disposed with, to be connected with antenna
Radio frequency connector is connected by RF cable with antenna feed point.Specifically, antenna 601 is by RF cable 609 and circuit
Radio frequency connector 610 on mainboard 606 is connected, and realizes transmitting and receives the effect of signal.All components are included in end
Among end housing 607.Figure 13 is four antenna terminal system side diagrams.As shown, in order to guarantee antenna mainboard 605 and circuit master
It is not interfered with each other between plate 606, needs that spacer 611 is added between.Optionally, spacer 611 is the flexibility of insulation
Film or plastic stent material.By this terminal antenna design scheme, the functional requirement of 4 × 4MIMO terminal can be realized.
The above content is specific embodiment is combined, further detailed description of the invention, and it cannot be said that this hair
Bright specific implementation is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, it is not taking off
Under the premise of from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to protection of the invention
Range.
Claims (9)
1. a kind of antenna element characterized by comprising antenna circuit board, at least two adjacent antennas and for being isolated
The electromagnetic coupling module that coupled signal transmits between adjacent two antenna；
For the electromagnetic coupling block coupled in series between two adjacent antennas, the electromagnetic coupling module includes isolated metal structure
And lumped-parameter element；
The isolated metal structure by lumped-parameter element respectively with two adjacent antenna in series, the isolated metal structure
It is made of, is connected between the sub- metal part by the lumped-parameter element, institute at least one independent sub- metal part
State an end hanging perhaps open a way another end ground connection or the short circuit of sub- metal part.
2. antenna element as described in claim 1, which is characterized in that be in series with lumped parameter member in the sub- metal part
Part.
3. antenna element as claimed in claim 2, which is characterized in that the lumped-parameter element includes automatically controlled adjustable device,
The control line of the automatically controlled adjustable device controls itself by the end of the sub- metal part.
4. antenna element as described in claim 1, which is characterized in that the electromagnetic coupling module includes: parallel resonance LC electricity
Road.
5. antenna element according to any one of claims 1-4, which is characterized in that the antenna circuit board includes two antennas
Clearance zone, the antenna headroom area are equipped at least two adjacent antennas, and described two antenna headroom areas are on a different plane.
6. antenna element according to any one of claims 1-4, which is characterized in that the antenna element includes first antenna group
With the second antenna sets, the first antenna group and second antenna sets include at least two adjacent antennas, and described first day
Line group and second antenna sets are arranged in the different or identical levels of the antenna circuit board.
7. antenna element as claimed in claim 6, which is characterized in that the first antenna group includes two adjacent antennas,
Second antenna sets include two adjacent antennas, and the first antenna group is arranged in antenna circuit board surface layer upper end,
The lower end of the antenna circuit board bottom is arranged in second antenna sets；Two antennas are relative to institute in the first antenna group
The distribution of antenna circuit board long axis mirror symmetry is stated, two antennas are relative to the antenna circuit board long axis mirror image in the second antenna sets
It is symmetrical.
8. a kind of terminal, which is characterized in that including antenna element, main circuit board and end as described in claim any one of 1-7
The operating circuit at end；
The operating circuit of the terminal is arranged on the main circuit board, and the antenna element is connect with the main circuit board.
9. terminal as claimed in claim 8, which is characterized in that further include spacer；The spacer is arranged in the main electricity
Between road plate and antenna mainboard.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410035207.2A CN104810617B (en) | 2014-01-24 | 2014-01-24 | A kind of antenna element and terminal |
| JP2016548169A JP6374971B2 (en) | 2014-01-24 | 2014-05-26 | Antenna unit and terminal |
| US15/113,224 US10033088B2 (en) | 2014-01-24 | 2014-05-26 | Antenna unit and terminal |
| EP14879479.5A EP3086408B1 (en) | 2014-01-24 | 2014-05-26 | Antenna unit and terminal |
| PCT/CN2014/078464 WO2015109706A1 (en) | 2014-01-24 | 2014-05-26 | Antenna unit and terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410035207.2A CN104810617B (en) | 2014-01-24 | 2014-01-24 | A kind of antenna element and terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104810617A CN104810617A (en) | 2015-07-29 |
| CN104810617B true CN104810617B (en) | 2019-09-13 |
Family
ID=53680729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410035207.2A Expired - Fee Related CN104810617B (en) | 2014-01-24 | 2014-01-24 | A kind of antenna element and terminal |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US10033088B2 (en) |
| EP (1) | EP3086408B1 (en) |
| JP (1) | JP6374971B2 (en) |
| CN (1) | CN104810617B (en) |
| WO (1) | WO2015109706A1 (en) |
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| CN106450754B (en) | 2016-09-20 | 2019-04-19 | 北京小米移动软件有限公司 | Radio reception device |
| CN106532261A (en) * | 2016-10-20 | 2017-03-22 | 嘉兴泰科通信科技有限公司 | Decoupling device and method for reducing antenna coupling in multi-antenna system |
| CN111129768B (en) | 2016-11-17 | 2022-01-11 | 华为技术有限公司 | Communication terminal |
| CN108281786A (en) * | 2017-01-05 | 2018-07-13 | 中兴通讯股份有限公司 | A kind of decoupling antenna frame and its decoupling method |
| JP6953799B2 (en) * | 2017-05-30 | 2021-10-27 | 株式会社デンソー | Antenna device |
| CN107275760B (en) * | 2017-05-31 | 2019-09-27 | 维沃移动通信有限公司 | A kind of terminal multi-antenna structure and mobile terminal |
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| CN107257016A (en) * | 2017-05-31 | 2017-10-17 | 维沃移动通信有限公司 | A kind of terminal multi-antenna structure and mobile terminal |
| CN107257017B (en) * | 2017-05-31 | 2019-10-18 | 维沃移动通信有限公司 | A kind of terminal multi-antenna structure and mobile terminal |
| CN107257022B (en) * | 2017-05-31 | 2019-11-15 | 维沃移动通信有限公司 | A kind of terminal multi-antenna structure and mobile terminal |
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| CN109672019B (en) * | 2017-10-17 | 2022-04-19 | 中兴通讯股份有限公司 | Terminal MIMO antenna device and method for realizing antenna signal transmission |
| CN107834171B (en) * | 2017-10-27 | 2024-07-05 | 上海安费诺永亿通讯电子有限公司 | Compact double-antenna unit for metal ring mobile phone and MIMO antenna system thereof |
| TWM566918U (en) * | 2018-04-20 | 2018-09-11 | 明泰科技股份有限公司 | Antenna architecture with low trace path |
| CN110931973A (en) * | 2018-09-20 | 2020-03-27 | 中兴通讯股份有限公司 | Terminal device |
| JP6678723B1 (en) | 2018-10-31 | 2020-04-08 | 京セラ株式会社 | Antenna, wireless communication module and wireless communication device |
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| CN112582795B (en) * | 2019-09-30 | 2023-05-09 | 北京小米移动软件有限公司 | Antenna structure and electronic equipment |
| TWI711219B (en) * | 2019-10-29 | 2020-11-21 | 緯創資通股份有限公司 | Antenna system |
| WO2021130844A1 (en) * | 2019-12-24 | 2021-07-01 | 三菱電機株式会社 | Antenna device and measurement system |
| JP7239514B2 (en) * | 2020-03-16 | 2023-03-14 | 京セラ株式会社 | Antennas, wireless communication modules and wireless communication equipment |
| JP7239513B2 (en) * | 2020-03-16 | 2023-03-14 | 京セラ株式会社 | Antennas, wireless communication modules and wireless communication equipment |
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- 2014-05-26 WO PCT/CN2014/078464 patent/WO2015109706A1/en active Application Filing
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Also Published As
| Publication number | Publication date |
|---|---|
| CN104810617A (en) | 2015-07-29 |
| US20170012345A1 (en) | 2017-01-12 |
| EP3086408A4 (en) | 2017-01-18 |
| JP6374971B2 (en) | 2018-08-15 |
| JP2017504274A (en) | 2017-02-02 |
| EP3086408B1 (en) | 2019-09-04 |
| EP3086408A1 (en) | 2016-10-26 |
| WO2015109706A1 (en) | 2015-07-30 |
| US10033088B2 (en) | 2018-07-24 |
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